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2(2b+4+4b)=-4
We move all terms to the left:
2(2b+4+4b)-(-4)=0
We add all the numbers together, and all the variables
2(6b+4)-(-4)=0
We add all the numbers together, and all the variables
2(6b+4)+4=0
We multiply parentheses
12b+8+4=0
We add all the numbers together, and all the variables
12b+12=0
We move all terms containing b to the left, all other terms to the right
12b=-12
b=-12/12
b=-1
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